Extended std.cfg

cfg/std.cfg

@@ -15,9 +15,19 @@
     <alloc init="true">fopen</alloc>
   </resource>
 
-  <function name="fopen">   <noreturn>false</noreturn> </function>
+  <function name="fopen">   <noreturn>false</noreturn> <arg nr="1"><not-null/><not-uninit/></arg><arg nr="2"><not-null/><not-uninit/></arg></function>
-  <function name="fclose">  <noreturn>false</noreturn> </function>
+  <function name="fclose">  <noreturn>false</noreturn> <arg nr="1"><not-null/><not-uninit/></arg></function>
-  <function name="fflush">  <noreturn>false</noreturn> <leak-ignore/> </function>
+  <function name="fflush">  <noreturn>false</noreturn> <leak-ignore/> <arg nr="1"><not-uninit/></arg></function>
+  <function name="fgetc">   <noreturn>false</noreturn> <leak-ignore/> <arg nr="1"><not-null/><not-uninit/></arg></function>
+  <function name="fgetpos"> <noreturn>false</noreturn> <leak-ignore/> <arg nr="1"><not-null/><not-uninit/></arg><arg nr="2"><not-null/><not-uninit/></arg></function> 
+  <function name="fgets">   
+	    <noreturn>false</noreturn> 
+	    <leak-ignore/> 
+		<arg nr="1"><not-null/></arg>
+		<arg nr="2"><not-uninit/><not-bool/><valid>0-</valid></arg> 
+		<arg nr="3"><not-null/><not-uninit/></arg> 
+  </function>
+  <function name="fsetpos"> <noreturn>false</noreturn> <leak-ignore/> <arg nr="1"><not-null/><not-uninit/></arg><arg nr="2"><not-null/><not-uninit/></arg></function> 
    
   <function name="isalnum"> <noreturn>false</noreturn> <leak-ignore/>  <arg nr="1"><valid>0-255</valid></arg> </function>
   <function name="isalpha"> <noreturn>false</noreturn> <leak-ignore/>  <arg nr="1"><valid>0-255</valid></arg> </function>
@@ -64,6 +74,10 @@
   <function name="wcstoul">  <leak-ignore/> <arg nr="3"><valid>0,2-36</valid></arg> </function>
   <function name="wcstoull"> <leak-ignore/> <arg nr="3"><valid>0,2-36</valid></arg> </function>
 
+
+  <function name="clearerr"> <noreturn>false</noreturn> <arg nr="1"><not-null/><not-uninit/></arg></function>
+  <function name="feof">     <noreturn>false</noreturn> <arg nr="1"><not-null/><not-uninit/></arg></function>
+  <function name="ferror">   <noreturn>false</noreturn> <arg nr="1"><not-null/><not-uninit/></arg></function>
   <function name="printf">   <noreturn>false</noreturn> <formatstr/>  <arg nr="1"><formatstr/></arg> <arg nr="any"><not-uninit/></arg> </function>
   <function name="wprintf">  <noreturn>false</noreturn> <formatstr/>  <arg nr="1"><formatstr/></arg> </function>
   <function name="sprintf">  <noreturn>false</noreturn> <formatstr/>  <arg nr="2"><formatstr/></arg> </function>

test/testnullpointer.cpp

@@ -2396,7 +2396,30 @@ private:
         const char errpq[] = "[test.cpp:1] -> [test.cpp:1]: (warning) Possible null pointer dereference: p - otherwise it is redundant to check it against null.\n"
                              "[test.cpp:1] -> [test.cpp:1]: (warning) Possible null pointer dereference: q - otherwise it is redundant to check it against null.\n";
 
-        // str..
+        check("void f(FILE *p){ clearerr (p);if(!p){}}");
+        ASSERT_EQUALS(errp,errout.str());
+
+        check("void f(FILE *p){ feof (p);if(!p){}}");
+        ASSERT_EQUALS(errp,errout.str());
+
+        check("void f(FILE *p){ fgetc (p);if(!p){}}");
+        ASSERT_EQUALS(errp,errout.str());
+
+        check("void f(FILE *p){ fclose (p);if(!p){}}");
+        ASSERT_EQUALS(errp,errout.str());
+
+        check("void f(FILE *p){ ferror (p);if(!p){}}");
+        ASSERT_EQUALS(errp,errout.str());
+
+        check("void f(char * p,char * q){ fopen (p,q);if(!p||!q){}}");
+        ASSERT_EQUALS(errpq,errout.str());
+
+        check("void f(FILE * p,fpos_t * q){ fgetpos (p,q);if(!p||!q){}}");
+        ASSERT_EQUALS(errpq,errout.str());
+
+        check("void f(FILE * p,fpos_t * q){ fsetpos (p,q);if(!p||!q){}}");
+        ASSERT_EQUALS(errpq,errout.str());
+
         check("void f(char * p){ strchr (p,c);if(!p){}}");
         ASSERT_EQUALS(errp,errout.str());
 

test/testuninitvar.cpp

@@ -67,6 +67,9 @@ private:
         TEST_CASE(uninitvar2_malloc);    // malloc returns uninitialized data
 
         TEST_CASE(syntax_error); // Ticket #5073
+
+        // Test that std.cfg is configured correctly
+        TEST_CASE(stdcfg);
     }
 
     void checkUninitVar(const char code[], const char filename[] = "test.cpp") {
@@ -3423,6 +3426,162 @@ private:
                         "}", "test.cpp", /*verify=*/true, /*debugwarnings=*/true);
         ASSERT_EQUALS("[test.cpp:6]: (debug) assertion failed '} while ('\n", errout.str());
     }
+
+    // Test that std.cfg is configured correctly
+    void stdcfg() {
+        // clearerr
+        checkUninitVar("void f() {\n"
+                       "  FILE * pFile;\n"
+                       "  clearerr (pFile);\n"
+                       "}");
+        ASSERT_EQUALS("[test.cpp:3]: (error) Uninitialized variable: pFile\n", errout.str());
+
+        checkUninitVar("void f(FILE * pFile) {\n"
+                       "  clearerr (pFile);\n"
+                       "}");
+        ASSERT_EQUALS("", errout.str());
+
+        // fclose
+        checkUninitVar("void f() {\n"
+                       "  FILE * pFile;\n"
+                       "  fclose (pFile);\n"
+                       "}");
+        ASSERT_EQUALS("[test.cpp:3]: (error) Uninitialized variable: pFile\n", errout.str());
+
+        checkUninitVar("void f(FILE * pFile) {\n"
+                       "  fclose (pFile);\n"
+                       "}");
+        ASSERT_EQUALS("", errout.str());
+
+        // fopen
+        checkUninitVar("void f() {\n"
+                       "  char * filename;\n"
+                       "  fopen (filename, \"w\");\n"
+                       "}");
+        ASSERT_EQUALS("[test.cpp:3]: (error) Uninitialized variable: filename\n", errout.str());
+
+        checkUninitVar("void f() {\n"
+                       "  char * filename;\n"
+                       "  char * mode;\n"
+                       "  fopen (filename, mode);\n"
+                       "}");
+        ASSERT_EQUALS("[test.cpp:4]: (error) Uninitialized variable: filename\n"
+                      "[test.cpp:4]: (error) Uninitialized variable: mode\n", errout.str());
+
+        checkUninitVar("void f(FILE * name, char *mode) {\n"
+                       "  fopen (name, mode);\n"
+                       "}");
+        ASSERT_EQUALS("", errout.str());
+
+        // feof
+        checkUninitVar("void f() {\n"
+                       "  FILE * pFile;\n"
+                       "  feof (pFile);\n"
+                       "}");
+        ASSERT_EQUALS("[test.cpp:3]: (error) Uninitialized variable: pFile\n", errout.str());
+
+        checkUninitVar("void f(FILE * pFile) {\n"
+                       "  feof (pFile);\n"
+                       "}");
+        ASSERT_EQUALS("", errout.str());
+
+        // ferror
+        checkUninitVar("void f() {\n"
+                       "  FILE * pFile;\n"
+                       "  ferror (pFile);\n"
+                       "}");
+        ASSERT_EQUALS("[test.cpp:3]: (error) Uninitialized variable: pFile\n", errout.str());
+
+        checkUninitVar("void f(FILE * pFile) {\n"
+                       "  ferror (pFile);\n"
+                       "}");
+        ASSERT_EQUALS("", errout.str());
+
+        // fflush
+        checkUninitVar("void f() {\n"
+                       "  FILE * pFile;\n"
+                       "  fflush (pFile);\n"
+                       "}");
+        ASSERT_EQUALS("[test.cpp:3]: (error) Uninitialized variable: pFile\n", errout.str());
+
+        checkUninitVar("void f(FILE * pFile) {\n"
+                       "  fflush (pFile);\n"
+                       "}");
+        ASSERT_EQUALS("", errout.str());
+
+        // fgetc
+        checkUninitVar("void f() {\n"
+                       "  FILE * pFile;\n"
+                       "  fgetc (pFile);\n"
+                       "}");
+        ASSERT_EQUALS("[test.cpp:3]: (error) Uninitialized variable: pFile\n", errout.str());
+
+        checkUninitVar("void f(FILE * pFile) {\n"
+                       "  fgetc (pFile);\n"
+                       "}");
+        ASSERT_EQUALS("", errout.str());
+
+
+        // fgetpos
+        checkUninitVar("void f() {\n"
+                       "  FILE * f;\n"
+                       "  fpos_t * p;\n"
+                       "  fgetpos (f, p);\n"
+                       "}");
+        ASSERT_EQUALS("[test.cpp:4]: (error) Uninitialized variable: f\n"
+                      "[test.cpp:4]: (error) Uninitialized variable: p\n", errout.str());
+
+        checkUninitVar("void f(FILE * f) {\n"
+                       "  fpos_t p;"
+                       "  fgetpos (f, &p);\n"
+                       "}");
+        ASSERT_EQUALS("", errout.str());
+
+        checkUninitVar("void f(FILE * f, fpos_t *p) {\n"
+                       "  fgetpos (f, p);\n"
+                       "}");
+        ASSERT_EQUALS("", errout.str());
+
+        // fsetpos
+        checkUninitVar("void f() {\n"
+                       "  FILE * f;\n"
+                       "  fpos_t * p;\n"
+                       "  fsetpos (f, p);\n"
+                       "}");
+        ASSERT_EQUALS("[test.cpp:4]: (error) Uninitialized variable: f\n"
+                      "[test.cpp:4]: (error) Uninitialized variable: p\n", errout.str());
+
+        checkUninitVar("void f(FILE * f) {\n"
+                       "  fpos_t *p;"
+                       "  fsetpos (f, p);\n"
+                       "}");
+        ASSERT_EQUALS("[test.cpp:2]: (error) Uninitialized variable: p\n", errout.str());
+
+        checkUninitVar("void f(FILE * f, fpos_t *p) {\n"
+                       "  fsetpos (f, p);\n"
+                       "}");
+        ASSERT_EQUALS("", errout.str());
+
+        // fgets
+        checkUninitVar("void f(FILE *f) {\n"
+                       "  char *s;\n"
+                       "  int n;\n"
+                       "  fgets (s, n, f);\n"
+                       "}");
+        ASSERT_EQUALS("[test.cpp:4]: (error) Uninitialized variable: n\n"
+                      "[test.cpp:4]: (error) Uninitialized variable: s\n", errout.str());
+
+        checkUninitVar("void f(char * s, int n) {\n"
+                       "  FILE *f;\n"
+                       "  fgets (s, n, f);\n"
+                       "}");
+        TODO_ASSERT_EQUALS("[test.cpp:3]: (error) Uninitialized variable: f\n","", errout.str());
+
+        checkUninitVar("void f(char * s, int n, FILE *f) {\n"
+                       "  fgets (s, n, f);\n"
+                       "}");
+        ASSERT_EQUALS("", errout.str());
+    }
 };
 
 REGISTER_TEST(TestUninitVar)